I keep seeing this now. OP posts something, people respond and then someone (sometimes more) comes along and says 'Ignore the posters who blah blah blah'. In other words 'ignore everyone who disagrees with me'. Can't these people have a conversation or debate with anyone? It's really rather rude.
Dear reader, I should should say that I'm really not terribly worried by this, it's just a mild annoyance because I think it's a cop out for proper conversation.